配置

<system.webServer>
<security>
<requestFiltering>
<requestLimits maxQueryString="xxxx"/>
</requestFiltering>
</security>

<httpRuntime requestValidationMode="2.0" maxRequestLength="20480" maxQueryStringLength="20480" />

<bindings>
      <wsHttpBinding>
        <binding name="NoneSecurity"
          maxBufferPoolSize="12000000" maxReceivedMessageSize="12000000" useDefaultWebProxy="false">
          <readerQuotas maxStringContentLength="12000000" maxArrayLength="12000000"/>
          <security mode="None"/>
        </binding>
      </wsHttpBinding>
    </bindings>

 bindingConfiguration="NoneSecurity"